QUINCY – The Social Security Administration says it is not considering closing any of its South Shore field offices as the agency struggles with budget cuts and the first waves of baby boomers entering retirement.

The U.S. Senate’s Special Committee on Aging issued a bipartisan report last week showing that the Social Security Administration had closed 64 field offices since 2010, the largest number of closures in a five-year period in the agency’s history.

In addition, the agency has closed 533 temporary mobile offices that often serve remote areas. Hours have been reduced in the 1,245 field offices that are still open, the report said.

Cuts in the agency’s budget have been blamed for the closings.

In Massachusetts, the Social Security Administration has 30 local offices, including ones in Quincy, Hanover, Brockton and Taunton. The offices serve the 1.5 million people in the state collecting Social Security or Supplemental Security Income benefits.

“There is no effort at this time to consolidate any Social Security offices in this region,” said Stephen Richardson, deputy communication director at the Social Security regional office in Boston.

The office closings come at a time when millions of baby boomers approach retirement, swamping the agency with applications for benefits, a senior agency official told Congress Wednesday. At the same time, better Internet access and more online services are easing the transition, said Nancy Berryhill, the agency's deputy commissioner for operations.

“We are fully committed – now and in the future – to sustaining a field office structure that provides face-to-face service for those customers who need or prefer such service,” Berryhill told the Senate Special Committee on Aging at a hearing Wednesday. “We also understand, however, that customer expectations are evolving due to changes in technology, demographics and other factors.”

Senators appeared unconvinced.

“The fact of the matter is, millions of seniors and disabled Americans are not accustomed to doing business online,” said Sen. Susan Collins of Maine, the top Republican on the Aging Committee. “Even as computer and broadband technologies become more widespread, the idea that the Social Security Administration can serve beneficiaries primarily online ignores the very real needs of the senior and disabled populations.”

Like many federal agencies, Social Security has faced budget cuts in recent years. After two years of shrinking budgets, the agency got a 6 percent increase this year, to $11.8 billion.

Social Security has cut its workforce by 11,000 employees over the past three years, Berryhill said. She said the agency saves an average of $4 million over the course of a decade for every field office it closes.